Hot-air furnace



H. G. DAYTON.

Hot Air Furnace.

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UNITED STATES PATENT OFFICE.

H. G. DAYTON, OF MAYSVILLE, KENTUCKY.

HOT-AIR FURNACE.

Specification forming part of Letters Patent No. 56, 727, dated July 31, 1866.

' To all whom t may conce/m.-

thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which*- Figure l represents a vertical central section of this invention. Fig. 2 is a horizontal section of the same, the line :v x, Fig. 1, indicating the plane of section. Fig. 3 is a similar section of the same, taken in the plane indicated by the line y y, Fig. 1.

Similar letters of reference indicate like parts.

This invention consists in the arrangement of a series of concentric annular air-dues, each of which communicates with the external atmosphere through one or more pipes extending into the same near to their bottoms, in combination with an annular combustionchamber which incloses the air-lines, and which is surrounded by a jacket with double walls, lled in with coal-dust, ashes, or other suitable material to prevent radiation, in such a manner that with a comparatively small expenditure of fuel a large quantity of air can be heated and distributed through a dwellinghouse or other building. A suitable Watervessel secured over the central air-due and arranged so that it communicates with a supplytank on the exterior of the jacket serves toA impart to the heated air the requisite quantity of moisture so as to render the same innoxious to the. health.

My hot-air furnace is composed of a series of air-fines, a b c, formed by three (more or less) concentric cylinders, A B C, as shown in Fig. l of the drawings. These cylinders are supported by the top D of the fire-pot E, to

which access is had through the fire-door F, and the bottom of which forms a grate, Gr, on which the fuel is placed.

The products of combustion pass from the Ynre-pot through segmental opening d (see Fig. y 3) into the annular combustion-chamber e,

which is formedbetween the cylinder C on its inside and the cylinder H on its outside, and from this chamber the products of combustion are carried off through the `ue I.

The air-lines ab o are supplied with cold air through a series of pipes, fg h, the pipe h being made to extend through the pipes f and g to the inner cylindrical ilile, a, the pipes g, through the pipes f, to the annular iiue b, and the pipes h to the annular flues c, as clearly shown in Fig. l of the drawings. Each of the air-flues is thus suppliedwith a large quantity of atmospheric air, which is heated while passing through the pipes f g h and through said air-ues, so that it discharges from the furnace in a highly-heated state.

This furnace is inclosed in a jacket., K, which is made with double walls and filled with ashes or other suitable material to prevent radiation.` Between this jacket and the outer surface of the combustion-chamber an annular space is formed, which is filled with heated air, and

from the top or cover L of" this jacket extend.

a series of pipes, L, which conduct the heated air to the various parts ofthe building in-which the furnace is placed.

The cylinder A, forming the central air-flue, a, is somewhat shorter than the cylinders B, C, and H, and a vessel, M, is hung over the said central air-due, being supported by arms m, which rest on the edge of the cylinder B. This vessel is supplied with water through a pipe, n, which extends through the cylinders B, C, and H, and through the jacket K, and connects with a tank, N. This tank is set as near as possible on a level with the vessel M, so that by the depth of the Water in said tank N the quantity of water in the vessel M can be observed. By these means but little attention is required to keep a sucient supply of water in the vessel M, and the hot air, on emanating from the furnace, is charge-d with the requisite amount of moisture to render the same innoxious to the health of the persons in the house or building.

It is obvious that this hot-air furnace can be constructed of any desirable size, large or small, according to the space to be heated.

. What I claim as new, and desire to secure by Letters Patent, is

l. The concentric series of hot-air iiues a b c,

in combination With the combustion-chamber e, jacket K, and tank N, all constructed and e and jacket K, all constructed and operating operating substantially as and for the purpose substantial] y as and for the purpose described. described.

2. The air-supply pipes fg uiu combination The above specification of my invention with the hot-air flues a b c and combustionsigned by me this 11th day of January, 1866.

chamber e, constructed and operating subst-zm- H. Gr. DAYTON.

tially as and for the purpose set forth. Witnesses:

3. The Water-vessel M, in combination with M. M. LIVINGSTON, the concentric ues a b c, combustion-chamber W. HAUFF.

i I, i 

